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/*************************************************************************** |
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* * |
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* Copyright (C) 2017 Christian Schoenebeck * |
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* <cuse@users.sourceforge.net> * |
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* * |
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* This library is part of libgig. * |
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* * |
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* This library is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This library is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this library; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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|
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#include "Serialization.h" |
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|
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#include <iostream> |
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#include <assert.h> |
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#include <string.h> // for memcpy() |
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#include <stdlib.h> // for atof() |
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#include <cxxabi.h> |
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|
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#include "helper.h" |
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|
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#define LIBGIG_EPOCH_TIME ((time_t)0) |
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|
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namespace Serialization { |
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|
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// *************** DataType *************** |
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// * |
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|
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static UID _createNullUID() { |
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const UID uid = { NULL, 0 }; |
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return uid; |
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} |
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|
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const UID NO_UID = _createNullUID(); |
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|
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/** @brief Check whether this is a valid unique identifier. |
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* |
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* Returns @c false if this UID can be considered an invalid unique |
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* identifier. This is for example the case if this UID object was not |
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* explicitly set to some certain meaningful unique identifier value, or if |
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* this UID object was intentionally assigned the constant @c NO_UID value. |
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* Both represent essentially an UID object which is all zero. |
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* |
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* Note that this class also implements the @c bool operator, both return |
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* the same boolean result. |
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*/ |
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bool UID::isValid() const { |
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return id != NULL && id != (void*)-1 && size; |
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} |
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|
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// *************** DataType *************** |
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// * |
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|
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/** @brief Default constructor. |
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* |
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* Initializes a DataType object as being an "invalid" DataType object. |
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* Thus calling isValid(), after creating a DataType object with this |
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* constructor, would return @c false. |
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* |
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* To create a valid and meaningful DataType object instead, call the static |
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* function DataType::dataTypeOf() instead. |
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*/ |
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DataType::DataType() { |
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m_size = 0; |
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m_isPointer = false; |
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} |
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|
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DataType::DataType(bool isPointer, int size, String baseType, String customType) { |
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m_size = size; |
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m_isPointer = isPointer; |
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m_baseTypeName = baseType; |
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m_customTypeName = customType; |
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} |
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|
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/** @brief Check if this is a valid DataType object. |
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* |
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* Returns @c true if this DataType object is reflecting a valid data type. |
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* The default constructor creates DataType objects initialized to be |
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* "invalid" DataType objects by default. That way one can detect whether |
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* a DataType object was ever assigned to something meaningful. |
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* |
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* Note that this class also implements the @c bool operator, both return |
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* the same boolean result. |
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*/ |
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bool DataType::isValid() const { |
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return m_size; |
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} |
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|
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/** @brief Whether this is reflecting a C/C++ pointer type. |
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* |
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* Returns @true if the respective native C/C++ object, member or variable |
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* (this DataType instance is reflecting) is a C/C++ pointer type. |
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*/ |
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bool DataType::isPointer() const { |
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return m_isPointer; |
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} |
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|
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/** @brief Whether this is reflecting a C/C++ @c struct or @c class type. |
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* |
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* Returns @c true if the respective native C/C++ object, member or variable |
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* (this DataType instance is reflecting) is a C/C++ @c struct or @c class |
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* type. |
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* |
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* Note that in the following example: |
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* @code |
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* struct Foo { |
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* int a; |
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* bool b; |
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* }; |
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* Foo foo; |
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* Foo* pFoo; |
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* @endcode |
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* the DataType objects of both @c foo, as well as of the C/C++ pointer |
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* @c pFoo would both return @c true for isClass() here! |
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* |
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* @see isPointer() |
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*/ |
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bool DataType::isClass() const { |
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return m_baseTypeName == "class"; |
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} |
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|
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/** @brief Whether this is reflecting a fundamental C/C++ data type. |
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* |
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* Returns @c true if the respective native C/C++ object, member or variable |
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* (this DataType instance is reflecting) is a primitive, fundamental C/C++ |
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* data type. Those are fundamental data types which are already predefined |
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* by the C/C++ language, for example: @c char, @c int, @c float, @c double, |
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* @c bool, but also @b any pointer types like @c int*, @c double**, but |
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* including pointers to user defined types like: |
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* @code |
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* struct Foo { |
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* int a; |
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* bool b; |
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* }; |
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* Foo* pFoo; |
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* @endcode |
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* So the DataType object of @c pFoo in the latter example would also return |
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* @c true for isPrimitive() here! |
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* |
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* @see isPointer() |
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*/ |
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bool DataType::isPrimitive() const { |
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return !isClass(); |
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} |
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|
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/** @brief Whether this is an integer C/C++ data type. |
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* |
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* Returns @c true if the respective native C/C++ object, member or variable |
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* (this DataType instance is reflecting) is a (fundamental, primitive) |
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* integer data type. So these are all @c int and @c unsigned @c int types |
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* of any size. It does not include floating point ("real") types though. |
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* |
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* You may use isSigned() to further check whether this data type allows |
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* negative numbers. |
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* |
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* Note that this method also returns @c true on integer pointer types! |
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* |
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* @see isPointer() |
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*/ |
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bool DataType::isInteger() const { |
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return m_baseTypeName.substr(0, 3) == "int" || |
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m_baseTypeName.substr(0, 4) == "uint"; |
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} |
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|
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/** @brief Whether this is a floating point based C/C++ data type. |
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* |
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* Returns @c true if the respective native C/C++ object, member or variable |
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* (this DataType instance is reflecting) is a (fundamental, primitive) |
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* floating point based data type. So these are currently the C/C++ @c float |
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* and @c double types. It does not include integer types though. |
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* |
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* Note that this method also returns @c true on @c float pointer and |
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* @c double pointer types! |
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* |
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* @see isPointer() |
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*/ |
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bool DataType::isReal() const { |
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return m_baseTypeName.substr(0, 4) == "real"; |
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} |
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|
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/** @brief Whether this is a boolean C/C++ data type. |
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* |
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* Returns @c true if the respective native C/C++ object, member or variable |
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* (this DataType instance is reflecting) is a (fundamental, primitive) |
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* boolean data type. So this is the case for the C++ @c bool data type. |
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* It does not include integer or floating point types though. |
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* |
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* Note that this method also returns @c true on @c bool pointer types! |
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* |
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* @see isPointer() |
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*/ |
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bool DataType::isBool() const { |
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return m_baseTypeName == "bool"; |
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} |
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|
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/** @brief Whether this is a C/C++ @c enum data type. |
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* |
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* Returns @c true if the respective native C/C++ object, member or variable |
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* (this DataType instance is reflecting) is a user defined enumeration |
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* data type. So this is the case for all C/C++ @c enum data types. |
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* It does not include integer (or even floating point) types though. |
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* |
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* Note that this method also returns @c true on @c enum pointer types! |
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* |
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* @see isPointer() |
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*/ |
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bool DataType::isEnum() const { |
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return m_baseTypeName == "enum"; |
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} |
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|
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/** @brief Whether this is a signed integer C/C++ data type. |
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* |
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* Returns @c true if the respective native C/C++ object, member or variable |
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* (this DataType instance is reflecting) is a (fundamental, primitive) |
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* signed integer data type. This is the case for are all @c unsigned |
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* @c int C/C++ types of any size. For all floating point ("real") based |
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* types this method returns @c false though! |
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* |
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* Note that this method also returns @c true on signed integer pointer |
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* types! |
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* |
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* @see isInteger(); |
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*/ |
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bool DataType::isSigned() const { |
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return m_baseTypeName.substr(0, 3) == "int" || |
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isReal(); |
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} |
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|
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/** @brief Comparison for equalness. |
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* |
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* Returns @c true if the two DataType objects being compared can be |
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* considered to be "equal" C/C++ data types. They are considered to be |
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* equal if their underlying C/C++ data types are exactly identical. For |
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* example comparing @c int and @c unsigned int data types are considere to |
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* be @b not equal, since they are differently signed. Furthermore @c short |
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* @c int and @c long @c int would also not be considered to be equal, since |
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* they do have a different memory size. Additionally pointer type |
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* characteristic is compared as well. So a @c double type and @c double* |
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* type are also considered to be not equal data types and hence this method |
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* would return @c false. |
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* |
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* As an exception here, classes and structs with the same class/struct name |
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* but different sizes are also considered to be "equal". This relaxed |
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* requirement is necessary to retain backward compatiblity to older |
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* versions of the same native C++ classes/structs. |
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*/ |
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bool DataType::operator==(const DataType& other) const { |
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return m_baseTypeName == other.m_baseTypeName && |
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m_customTypeName == other.m_customTypeName && |
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(m_size == other.m_size || (isClass() && other.isClass())) && |
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m_isPointer == other.m_isPointer; |
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} |
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|
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/** @brief Comparison for inequalness. |
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* |
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* Returns the inverse result of what DataType::operator==() would return. |
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* So refer to the latter for more details. |
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*/ |
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bool DataType::operator!=(const DataType& other) const { |
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return !operator==(other); |
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} |
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|
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/** @brief Smaller than comparison. |
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* |
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* Returns @c true if this DataType object can be consider to be "smaller" |
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* than the @a other DataType object being compared with. This operator |
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* is actually quite arbitrarily implemented and may change at any time, |
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* and thus result for the same data types may change in future at any time. |
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* |
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* This operator is basically implemented for allowing this DataType class |
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* to be used with various standard template library (STL) classes, which |
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* require sorting operators to be implemented. |
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*/ |
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bool DataType::operator<(const DataType& other) const { |
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return m_baseTypeName < other.m_baseTypeName || |
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(m_baseTypeName == other.m_baseTypeName && |
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m_customTypeName < other.m_customTypeName || |
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(m_customTypeName == other.m_customTypeName && |
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m_size < other.m_size || |
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(m_size == other.m_size && |
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m_isPointer < other.m_isPointer))); |
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} |
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|
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/** @brief Greater than comparison. |
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* |
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* Returns @c true if this DataType object can be consider to be "greater" |
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* than the @a other DataType object being compared with. This operator |
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* is actually quite arbitrarily implemented and may change at any time, |
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* and thus result for the same data types may change in future at any time. |
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* |
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* This operator is basically implemented for allowing this DataType class |
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* to be used with various standard template library (STL) classes, which |
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* require sorting operators to be implemented. |
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*/ |
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bool DataType::operator>(const DataType& other) const { |
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return !(operator==(other) || operator<(other)); |
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} |
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|
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/** @brief Human readable long description for this data type. |
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* |
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* Returns a human readable long description for this data type, designed |
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* for the purpose for being displayed to the user. Note that the |
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* implementation for this method and thus the precise textual strings |
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* returned by this method, may change at any time. So you should not rely |
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* on precise strings for certain data types, and you should not use the |
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* return values of this method for comparing data types with each other. |
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* |
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* This class implements various comparison operators, so you should use |
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* them for comparing DataTypes objects instead. |
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* |
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* @see baseTypeName(), customTypeName() |
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*/ |
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String DataType::asLongDescr() const { |
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String s = m_baseTypeName; |
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if (!m_customTypeName.empty()) |
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s += " " + customTypeName(true); |
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if (isPointer()) |
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s += " pointer"; |
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return s; |
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} |
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|
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/** @brief The base type name of this data type. |
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* |
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* Returns a textual short string identifying the basic type of name of this |
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* data type. For example for a 32 bit signed integer data type this method |
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* would return @c "int32". For all user defined C/C++ @c enum types this |
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* method would return "enum". For all user defined C/C++ @c struct @b and |
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* @c class types this method would return "class" for both. Note that the |
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* precise user defined type name (of i.e. @c enum, @c struct and @c class |
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* types) is not included in the string returned by this method, use |
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* customTypeName() to retrieve that information instead. |
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* |
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* The precise textual strings returned by this method are guaranteed to |
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* retain equal with future versions of this framework. So you can rely on |
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* them for using the return values of this method for comparison tasks in |
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* your application. Note however that this class also implements various |
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* comparison operators. |
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* |
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* Further it is important to know that this method returns the same string |
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* for pointers and non-pointers of the same underlying data type. So in the |
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* following example: |
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* @code |
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* #include <stdint.h> |
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* uint64_t i; |
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* uint64_t* pi; |
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* @endcode |
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* this method would return for both @c i and @c pi the string @c "uint64" ! |
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* |
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* @see isPointer(), customTypeName() |
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*/ |
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String DataType::baseTypeName() const { |
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return m_baseTypeName; |
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} |
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|
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/** @brief The user defined C/C++ data type name of this data type. |
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* |
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* Call this method on user defined C/C++ data types like @c enum, @c struct |
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* and @c class types to retrieve the user defined type name portion of |
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* those data types. Note that this method is only intended for such user |
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* defined data types. For all fundamental, primitive data types (like i.e. |
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* @c int) this method returns an empty string instead. |
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* |
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* This method takes an optional boolean argument @b demangle, which allows |
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* you define whether you are interested in the raw C++ type name or rather |
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* the demangled custom type name. By default this method returns the raw |
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* C++ type name. The raw C++ type name is the one that is actually used |
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* in the compiled binaries and should be preferred for comparions tasks. |
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* The demangled C++ type name is a human readable representation of the |
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* type name instead, which you may use for displaying the user defined type |
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* name portion to the user, however you should not use the demangled |
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* representation for comparison tasks. |
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* |
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* Note that in the following example: |
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* @code |
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* struct Foo { |
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* int a; |
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* bool b; |
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* }; |
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* Foo foo; |
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* Foo* pFoo; |
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* @endcode |
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* this method would return the same string for both @c foo and @c pFoo ! |
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* In the latter example @c customTypeName(true) would return for both |
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* @c foo and @c pFoo the string @c "Foo" as return value of this method. |
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* |
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* @see isPointer(), baseTypeName() |
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*/ |
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String DataType::customTypeName(bool demangle) const { |
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if (!demangle) return m_customTypeName; |
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int status; |
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const char* result = |
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abi::__cxa_demangle(m_customTypeName.c_str(), 0, 0, &status); |
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return (status == 0) ? result : m_customTypeName; |
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} |
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|
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// *************** Member *************** |
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// * |
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|
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/** @brief Default constructor. |
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* |
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* Initializes a Member object as being an "invalid" Member object. |
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* Thus calling isValid(), after creating a Member object with this |
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* constructor, would return @c false. |
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* |
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* You are currently not supposed to create (meaningful) Member objects on |
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* your own. This framework automatically create such Member objects for |
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* you instead. |
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* |
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* @see Object::members() |
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*/ |
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Member::Member() { |
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m_uid = NO_UID; |
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m_offset = 0; |
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} |
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|
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Member::Member(String name, UID uid, size_t offset, DataType type) { |
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m_name = name; |
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m_uid = uid; |
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m_offset = offset; |
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m_type = type; |
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} |
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|
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/** @brief Unique identifier of this member instance. |
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* |
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* Returns the unique identifier of the original C/C++ member instance of |
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* your C++ class. It is important to know that this unique identifier is |
439 |
* not meant to be unique for Member instances themselves, but it is rather |
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* meant to be unique for the original native C/C++ data these Member |
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* instances are representing. So that means no matter how many individual |
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* Member objects are created, as long as they are representing the same |
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* original native member variable of the same original native |
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* instance of your C++ class, then all those separately created Member |
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* objects return the same unique identifier here. |
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* |
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* @see UID for more details |
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*/ |
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UID Member::uid() const { |
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return m_uid; |
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} |
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|
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/** @brief Name of the member. |
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* |
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* Returns the name of the native C/C++ member variable as originally typed |
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* in its C++ source code. So in the following example: |
457 |
* @code |
458 |
* struct Foo { |
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* int a; |
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* bool b; |
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* double someValue; |
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* }; |
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* @endcode |
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* this method would usually return @c "a" for the first member of object |
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* instances of your native C/C++ @c struct @c Foo, and this method would |
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* usually return @c "someValue" for its third member. |
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* |
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* Note that when you implement the @c serialize() method of your own C/C++ |
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* clases or strucs, you are able to override defining the precise name of |
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* your members. In that case this method would of course return the member |
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* names as explicitly forced by you instead. |
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*/ |
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String Member::name() const { |
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return m_name; |
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} |
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|
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/** @brief Offset of member in its containing parent data structure. |
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* |
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* Returns the offset of this member (in bytes) within its containing parent |
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* user defined data structure or class. So in the following example: |
481 |
* @code |
482 |
* #include <stdint.h> |
483 |
* struct Foo __attribute__ ((__packed__)) { |
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* int32_t a; |
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* bool b; |
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* double c; |
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* }; |
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* @endcode |
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* this method would typically return @c 0 for member @c a, @c 4 for member |
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* @c b and @c 5 for member @c c. As you have noted in the latter example, |
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* the structure @c Foo was declared to have "packed" data members. That |
492 |
* means the compiler is instructed to add no memory spaces between the |
493 |
* individual members. Because by default the compiler might add memory |
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* spaces between individual members to align them on certain memory address |
495 |
* boundaries for increasing runtime performance while accessing the |
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* members. So if you declared the previous example without the "packed" |
497 |
* attribute like: |
498 |
* @code |
499 |
* #include <stdint.h> |
500 |
* struct Foo { |
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* int32_t a; |
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* bool b; |
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* double c; |
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* }; |
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* @endcode |
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* then this method would usually return a different offset for members |
507 |
* @c b and @c c instead. For most 64 bit architectures this example would |
508 |
* now still return @c 0 for member @c a, but @c 8 for member @c b and @c 16 |
509 |
* for member @c c. |
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*/ |
511 |
size_t Member::offset() const { |
512 |
return m_offset; |
513 |
} |
514 |
|
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/** @brief C/C++ Data type of this member. |
516 |
* |
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* Returns the precise data type of the original native C/C++ member. |
518 |
*/ |
519 |
const DataType& Member::type() const { |
520 |
return m_type; |
521 |
} |
522 |
|
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/** @brief Check if this is a valid Member object. |
524 |
* |
525 |
* Returns @c true if this Member object is reflecting a "valid" member |
526 |
* object. The default constructor creates Member objects initialized to be |
527 |
* "invalid" Member objects by default. That way one can detect whether |
528 |
* a Member object was ever assigned to something meaningful. |
529 |
* |
530 |
* Note that this class also implements the @c bool operator, both return |
531 |
* the same boolean result value. |
532 |
*/ |
533 |
bool Member::isValid() const { |
534 |
return m_uid && !m_name.empty() && m_type; |
535 |
} |
536 |
|
537 |
/** @brief Comparison for equalness. |
538 |
* |
539 |
* Returns @c true if the two Member objects being compared can be |
540 |
* considered to be "equal" C/C++ members. They are considered to be |
541 |
* equal if their data type, member name, their offset within their parent |
542 |
* containing C/C++ data structure, as well as their original native C/C++ |
543 |
* instance were exactly identical. |
544 |
*/ |
545 |
bool Member::operator==(const Member& other) const { |
546 |
return m_uid == other.m_uid && |
547 |
m_offset == other.m_offset && |
548 |
m_name == other.m_name && |
549 |
m_type == other.m_type; |
550 |
} |
551 |
|
552 |
/** @brief Comparison for inequalness. |
553 |
* |
554 |
* Returns the inverse result of what Member::operator==() would return. |
555 |
* So refer to the latter for more details. |
556 |
*/ |
557 |
bool Member::operator!=(const Member& other) const { |
558 |
return !operator==(other); |
559 |
} |
560 |
|
561 |
/** @brief Smaller than comparison. |
562 |
* |
563 |
* Returns @c true if this Member object can be consider to be "smaller" |
564 |
* than the @a other Member object being compared with. This operator |
565 |
* is actually quite arbitrarily implemented and may change at any time, |
566 |
* and thus result for the same member representations may change in |
567 |
* future at any time. |
568 |
* |
569 |
* This operator is basically implemented for allowing this DataType class |
570 |
* to be used with various standard template library (STL) classes, which |
571 |
* require sorting operators to be implemented. |
572 |
*/ |
573 |
bool Member::operator<(const Member& other) const { |
574 |
return m_uid < other.m_uid || |
575 |
(m_uid == other.m_uid && |
576 |
m_offset < other.m_offset || |
577 |
(m_offset == other.m_offset && |
578 |
m_name < other.m_name || |
579 |
(m_name == other.m_name && |
580 |
m_type < other.m_type))); |
581 |
} |
582 |
|
583 |
/** @brief Greater than comparison. |
584 |
* |
585 |
* Returns @c true if this Member object can be consider to be "greater" |
586 |
* than the @a other Member object being compared with. This operator |
587 |
* is actually quite arbitrarily implemented and may change at any time, |
588 |
* and thus result for the same member representations may change in |
589 |
* future at any time. |
590 |
* |
591 |
* This operator is basically implemented for allowing this DataType class |
592 |
* to be used with various standard template library (STL) classes, which |
593 |
* require sorting operators to be implemented. |
594 |
*/ |
595 |
bool Member::operator>(const Member& other) const { |
596 |
return !(operator==(other) || operator<(other)); |
597 |
} |
598 |
|
599 |
// *************** Object *************** |
600 |
// * |
601 |
|
602 |
/** @brief Default constructor (for an "invalid" Object). |
603 |
* |
604 |
* Initializes an Object instance as being an "invalid" Object. |
605 |
* Thus calling isValid(), after creating an Object instance with this |
606 |
* constructor, would return @c false. |
607 |
* |
608 |
* Usually you are not supposed to create (meaningful) Object instances on |
609 |
* your own. They are typically constructed by the Archive class for you. |
610 |
* |
611 |
* @see Archive::rootObject(), Archive::objectByUID() |
612 |
*/ |
613 |
Object::Object() { |
614 |
m_version = 0; |
615 |
m_minVersion = 0; |
616 |
} |
617 |
|
618 |
/** @brief Constructor for a "meaningful" Object. |
619 |
* |
620 |
* Initializes a "meaningful" Object instance as being. Thus calling |
621 |
* isValid(), after creating an Object instance with this constructor, |
622 |
* should return @c true, provided that the arguments passed to this |
623 |
* constructor construe a valid object representation. |
624 |
* |
625 |
* Usually you are not supposed to create (meaningful) Object instances on |
626 |
* your own. They are typically constructed by the Archive class for you. |
627 |
* |
628 |
* @see Archive::rootObject(), Archive::objectByUID() |
629 |
* |
630 |
* @param uidChain - unique identifier chain of the object to be constructed |
631 |
* @param type - C/C++ data type of the actual native object this abstract |
632 |
* Object instance should reflect after calling this |
633 |
* constructor |
634 |
*/ |
635 |
Object::Object(UIDChain uidChain, DataType type) { |
636 |
m_type = type; |
637 |
m_uid = uidChain; |
638 |
m_version = 0; |
639 |
m_minVersion = 0; |
640 |
//m_data.resize(type.size()); |
641 |
} |
642 |
|
643 |
/** @brief Check if this is a valid Object instance. |
644 |
* |
645 |
* Returns @c true if this Object instance is reflecting a "valid" Object. |
646 |
* The default constructor creates Object instances initialized to be |
647 |
* "invalid" Objects by default. That way one can detect whether an Object |
648 |
* instance was ever assigned to something meaningful. |
649 |
* |
650 |
* Note that this class also implements the @c bool operator, both return |
651 |
* the same boolean result value. |
652 |
*/ |
653 |
bool Object::isValid() const { |
654 |
return m_type && !m_uid.empty(); |
655 |
} |
656 |
|
657 |
/** @brief Unique identifier of this Object. |
658 |
* |
659 |
* Returns the unique identifier for the original native C/C++ data this |
660 |
* abstract Object instance is reflecting. If this Object is representing |
661 |
* a C/C++ pointer (of first degree) then @c uid() (or @c uid(0) ) returns |
662 |
* the unique identifier of the pointer itself, whereas @c uid(1) returns |
663 |
* the unique identifier of the original C/C++ data that pointer was |
664 |
* actually pointing to. |
665 |
* |
666 |
* @see UIDChain for more details about this overall topic. |
667 |
*/ |
668 |
UID Object::uid(int index) const { |
669 |
return (index < m_uid.size()) ? m_uid[index] : NO_UID; |
670 |
} |
671 |
|
672 |
/** @brief Unique identifier chain of this Object. |
673 |
* |
674 |
* Returns the entire unique identifier chain of this Object. |
675 |
* |
676 |
* @see uid() and UIDChain for more details about this overall topic. |
677 |
*/ |
678 |
const UIDChain& Object::uidChain() const { |
679 |
return m_uid; |
680 |
} |
681 |
|
682 |
/** @brief C/C++ data type this Object is reflecting. |
683 |
* |
684 |
* Returns the precise original C/C++ data type of the original native |
685 |
* C/C++ object or data this Object instance is reflecting. |
686 |
*/ |
687 |
const DataType& Object::type() const { |
688 |
return m_type; |
689 |
} |
690 |
|
691 |
/** @brief Raw data of the original native C/C++ data. |
692 |
* |
693 |
* Returns the raw data value of the original C/C++ data this Object is |
694 |
* reflecting. So the precise raw data value, layout and size is dependent |
695 |
* to the precise C/C++ data type of the original native C/C++ data. However |
696 |
* potentially required endian correction is already automatically applied |
697 |
* for you. That means you can safely, directly C-cast the raw data returned |
698 |
* by this method to the respective native C/C++ data type in order to |
699 |
* access and use the value for some purpose, at least if the respective |
700 |
* data is of any fundamental, primitive C/C++ data type, or also to a |
701 |
* certain extent if the type is user defined @c enum type. |
702 |
* |
703 |
* However directly C-casting this raw data for user defined @c struct or |
704 |
* @c class types is not possible. For those user defined data structures |
705 |
* this method always returns empty raw data instead. |
706 |
* |
707 |
* Note however that there are more convenient methods in the Archive class |
708 |
* to get the right value for the individual data types instead. |
709 |
* |
710 |
* @see Archive::valueAsInt(), Archive::valueAsReal(), Archive::valueAsBool(), |
711 |
* Archive::valueAsString() |
712 |
*/ |
713 |
const RawData& Object::rawData() const { |
714 |
return m_data; |
715 |
} |
716 |
|
717 |
/** @brief Version of original user defined C/C++ @c struct or @c class. |
718 |
* |
719 |
* In case this Object is reflecting a native C/C++ @c struct or @c class |
720 |
* type, then this method returns the version of that native C/C++ @c struct |
721 |
* or @c class layout or implementation. For primitive, fundamental C/C++ |
722 |
* data types the return value of this method has no meaning. |
723 |
* |
724 |
* @see Archive::setVersion() for more details about this overall topic. |
725 |
*/ |
726 |
Version Object::version() const { |
727 |
return m_version; |
728 |
} |
729 |
|
730 |
/** @brief Minimum version of original user defined C/C++ @c struct or @c class. |
731 |
* |
732 |
* In case this Object is reflecting a native C/C++ @c struct or @c class |
733 |
* type, then this method returns the "minimum" version of that native C/C++ |
734 |
* @c struct or @c class layout or implementation which it may be compatible |
735 |
* with. For primitive, fundamental C/C++ data types the return value of |
736 |
* this method has no meaning. |
737 |
* |
738 |
* @see Archive::setVersion() and Archive::setMinVersion() for more details |
739 |
* about this overall topic. |
740 |
*/ |
741 |
Version Object::minVersion() const { |
742 |
return m_minVersion; |
743 |
} |
744 |
|
745 |
/** @brief All members of the original native C/C++ @c struct or @c class instance. |
746 |
* |
747 |
* In case this Object is reflecting a native C/C++ @c struct or @c class |
748 |
* type, then this method returns all member variables of that original |
749 |
* native C/C++ @c struct or @c class instance. For primitive, fundamental |
750 |
* C/C++ data types this method returns an empty vector instead. |
751 |
* |
752 |
* Example: |
753 |
* @code |
754 |
* struct Foo { |
755 |
* int a; |
756 |
* bool b; |
757 |
* double someValue; |
758 |
* }; |
759 |
* @endcode |
760 |
* Considering above's C++ code, a serialized Object representation of such |
761 |
* a native @c Foo class would have 3 members @c a, @c b and @c someValue. |
762 |
* |
763 |
* Note that the respective serialize() method implementation of that |
764 |
* fictional C++ @c struct @c Foo actually defines which members are going |
765 |
* to be serialized and deserialized for instances of class @c Foo. So in |
766 |
* practice the members returned by method members() here might return a |
767 |
* different set of members as actually defined in the original C/C++ struct |
768 |
* header declaration. |
769 |
* |
770 |
* The precise sequence of the members returned by this method here depends |
771 |
* on the actual serialize() implementation of the user defined C/C++ |
772 |
* @c struct or @c class. |
773 |
* |
774 |
* @see Object::sequenceIndexOf() for more details about the precise order |
775 |
* of members returned by this method in the same way. |
776 |
*/ |
777 |
std::vector<Member>& Object::members() { |
778 |
return m_members; |
779 |
} |
780 |
|
781 |
/** @brief All members of the original native C/C++ @c struct or @c class instance (read only). |
782 |
* |
783 |
* Returns the same result as overridden members() method above, it just |
784 |
* returns a read-only result instead. See above's method description for |
785 |
* details for the return value of this method instead. |
786 |
*/ |
787 |
const std::vector<Member>& Object::members() const { |
788 |
return m_members; |
789 |
} |
790 |
|
791 |
/** @brief Comparison for equalness. |
792 |
* |
793 |
* Returns @c true if the two Object instances being compared can be |
794 |
* considered to be "equal" native C/C++ object instances. They are |
795 |
* considered to be equal if they are representing the same original |
796 |
* C/C++ data instance, which is essentially the case if the original |
797 |
* reflecting native C/C++ data are sharing the same memory address and |
798 |
* memory size (thus the exact same memory space) and originally had the |
799 |
* exact same native C/C++ types. |
800 |
*/ |
801 |
bool Object::operator==(const Object& other) const { |
802 |
// ignoring all other member variables here |
803 |
// (since UID stands for "unique" ;-) ) |
804 |
return m_uid == other.m_uid && |
805 |
m_type == other.m_type; |
806 |
} |
807 |
|
808 |
/** @brief Comparison for inequalness. |
809 |
* |
810 |
* Returns the inverse result of what Object::operator==() would return. |
811 |
* So refer to the latter for more details. |
812 |
*/ |
813 |
bool Object::operator!=(const Object& other) const { |
814 |
return !operator==(other); |
815 |
} |
816 |
|
817 |
/** @brief Smaller than comparison. |
818 |
* |
819 |
* Returns @c true if this Object instance can be consider to be "smaller" |
820 |
* than the @a other Object instance being compared with. This operator |
821 |
* is actually quite arbitrarily implemented and may change at any time, |
822 |
* and thus result for the same Object representations may change in future |
823 |
* at any time. |
824 |
* |
825 |
* This operator is basically implemented for allowing this DataType class |
826 |
* to be used with various standard template library (STL) classes, which |
827 |
* require sorting operators to be implemented. |
828 |
*/ |
829 |
bool Object::operator<(const Object& other) const { |
830 |
// ignoring all other member variables here |
831 |
// (since UID stands for "unique" ;-) ) |
832 |
return m_uid < other.m_uid || |
833 |
(m_uid == other.m_uid && |
834 |
m_type < other.m_type); |
835 |
} |
836 |
|
837 |
/** @brief Greater than comparison. |
838 |
* |
839 |
* Returns @c true if this Object instance can be consider to be "greater" |
840 |
* than the @a other Object instance being compared with. This operator |
841 |
* is actually quite arbitrarily implemented and may change at any time, |
842 |
* and thus result for the same Object representations may change in future |
843 |
* at any time. |
844 |
* |
845 |
* This operator is basically implemented for allowing this DataType class |
846 |
* to be used with various standard template library (STL) classes, which |
847 |
* require sorting operators to be implemented. |
848 |
*/ |
849 |
bool Object::operator>(const Object& other) const { |
850 |
return !(operator==(other) || operator<(other)); |
851 |
} |
852 |
|
853 |
/** @brief Check version compatibility between Object instances. |
854 |
* |
855 |
* Use this method to check whether the two original C/C++ instances those |
856 |
* two Objects are reflecting, were using a C/C++ data type which are version |
857 |
* compatible with each other. By default all C/C++ Objects are considered |
858 |
* to be version compatible. They might only be version incompatible if you |
859 |
* enforced a certain backward compatibility constraint with your |
860 |
* serialize() method implementation of your custom C/C++ @c struct or |
861 |
* @c class types. |
862 |
* |
863 |
* You must only call this method on two Object instances which are |
864 |
* representing the same data type, for example if both Objects reflect |
865 |
* instances of the same user defined C++ class. Calling this method on |
866 |
* completely different data types does not cause an error or exception, but |
867 |
* its result would simply be useless for any purpose. |
868 |
* |
869 |
* @see Archive::setVersion() for more details about this overall topic. |
870 |
*/ |
871 |
bool Object::isVersionCompatibleTo(const Object& other) const { |
872 |
if (this->version() == other.version()) |
873 |
return true; |
874 |
if (this->version() > other.version()) |
875 |
return this->minVersion() <= other.version(); |
876 |
else |
877 |
return other.minVersion() <= this->version(); |
878 |
} |
879 |
|
880 |
void Object::setVersion(Version v) { |
881 |
m_version = v; |
882 |
} |
883 |
|
884 |
void Object::setMinVersion(Version v) { |
885 |
m_minVersion = v; |
886 |
} |
887 |
|
888 |
/** @brief Get the member of this Object with given name. |
889 |
* |
890 |
* In case this Object is reflecting a native C/C++ @c struct or @c class |
891 |
* type, then this method returns the abstract reflection of the requested |
892 |
* member variable of the original native C/C++ @c struct or @c class |
893 |
* instance. For primitive, fundamental C/C++ data types this method always |
894 |
* returns an "invalid" Member instance instead. |
895 |
* |
896 |
* Example: |
897 |
* @code |
898 |
* struct Foo { |
899 |
* int a; |
900 |
* bool b; |
901 |
* double someValue; |
902 |
* }; |
903 |
* @endcode |
904 |
* Consider that you serialized the native C/C++ @c struct as shown in this |
905 |
* example, and assuming that you implemented the respective serialize() |
906 |
* method of this C++ @c struct to serialize all its members, then you might |
907 |
* call memberNamed("someValue") to get the details of the third member in |
908 |
* this example for instance. In case the passed @a name is an unknown |
909 |
* member name, then this method will return an "invalid" Member object |
910 |
* instead. |
911 |
* |
912 |
* @param name - original name of the sought serialized member variable of |
913 |
* this Object reflection |
914 |
* @returns abstract reflection of the sought member variable |
915 |
* @see Member::isValid(), Object::members() |
916 |
*/ |
917 |
Member Object::memberNamed(String name) const { |
918 |
for (int i = 0; i < m_members.size(); ++i) |
919 |
if (m_members[i].name() == name) |
920 |
return m_members[i]; |
921 |
return Member(); |
922 |
} |
923 |
|
924 |
/** @brief Get the member of this Object with given unique identifier. |
925 |
* |
926 |
* This method behaves similar like method memberNamed() described above, |
927 |
* but instead of searching for a member variable by name, it searches for |
928 |
* a member with an abstract unique identifier instead. For primitive, |
929 |
* fundamental C/C++ data types, for invalid or unknown unique identifiers, |
930 |
* and for members which are actually not member instances of the original |
931 |
* C/C++ @c struct or @c class instance this Object is reflecting, this |
932 |
* method returns an "invalid" Member instance instead. |
933 |
* |
934 |
* @param uid - unique identifier of the member variable being sought |
935 |
* @returns abstract reflection of the sought member variable |
936 |
* @see Member::isValid(), Object::members(), Object::memberNamed() |
937 |
*/ |
938 |
Member Object::memberByUID(const UID& uid) const { |
939 |
if (!uid) return Member(); |
940 |
for (int i = 0; i < m_members.size(); ++i) |
941 |
if (m_members[i].uid() == uid) |
942 |
return m_members[i]; |
943 |
return Member(); |
944 |
} |
945 |
|
946 |
void Object::remove(const Member& member) { |
947 |
for (int i = 0; i < m_members.size(); ++i) { |
948 |
if (m_members[i] == member) { |
949 |
m_members.erase(m_members.begin() + i); |
950 |
return; |
951 |
} |
952 |
} |
953 |
} |
954 |
|
955 |
/** @brief Get all members of this Object with given data type. |
956 |
* |
957 |
* In case this Object is reflecting a native C/C++ @c struct or @c class |
958 |
* type, then this method returns all member variables of that original |
959 |
* native C/C++ @c struct or @c class instance which are matching the given |
960 |
* requested data @a type. If this Object is reflecting a primitive, |
961 |
* fundamental data type, or if there are no members of this Object with the |
962 |
* requested precise C/C++ data type, then this method returns an empty |
963 |
* vector instead. |
964 |
* |
965 |
* @param type - the precise C/C++ data type of the sought member variables |
966 |
* of this Object |
967 |
* @returns vector with abstract reflections of the sought member variables |
968 |
* @see Object::members(), Object::memberNamed() |
969 |
*/ |
970 |
std::vector<Member> Object::membersOfType(const DataType& type) const { |
971 |
std::vector<Member> v; |
972 |
for (int i = 0; i < m_members.size(); ++i) { |
973 |
const Member& member = m_members[i]; |
974 |
if (member.type() == type) |
975 |
v.push_back(member); |
976 |
} |
977 |
return v; |
978 |
} |
979 |
|
980 |
/** @brief Serialization/deserialization sequence number of the requested member. |
981 |
* |
982 |
* Returns the precise serialization/deserialization sequence number of the |
983 |
* requested @a member variable. |
984 |
* |
985 |
* Example: |
986 |
* @code |
987 |
* struct Foo { |
988 |
* int a; |
989 |
* bool b; |
990 |
* double c; |
991 |
* |
992 |
* void serialize(Serialization::Archive* archive); |
993 |
* }; |
994 |
* @endcode |
995 |
* Assuming the declaration of the user defined native C/C++ @c struct |
996 |
* @c Foo above, and assuming the following implementation of serialize(): |
997 |
* @code |
998 |
* #define SRLZ(member) \ |
999 |
* archive->serializeMember(*this, member, #member); |
1000 |
* |
1001 |
* void Foo::serialize(Serialization::Archive* archive) { |
1002 |
* SRLZ(c); |
1003 |
* SRLZ(a); |
1004 |
* SRLZ(b); |
1005 |
* } |
1006 |
* @endcode |
1007 |
* then @c sequenceIndexOf(obj.memberNamed("a")) returns 1, |
1008 |
* @c sequenceIndexOf(obj.memberNamed("b")) returns 2, and |
1009 |
* @c sequenceIndexOf(obj.memberNamed("c")) returns 0. |
1010 |
*/ |
1011 |
int Object::sequenceIndexOf(const Member& member) const { |
1012 |
for (int i = 0; i < m_members.size(); ++i) |
1013 |
if (m_members[i] == member) |
1014 |
return i; |
1015 |
return -1; |
1016 |
} |
1017 |
|
1018 |
// *************** Archive *************** |
1019 |
// * |
1020 |
|
1021 |
/** @brief Create an "empty" archive. |
1022 |
* |
1023 |
* This default constructor creates an "empty" archive which you then |
1024 |
* subsequently for example might fill with serialized data like: |
1025 |
* @code |
1026 |
* Archive a; |
1027 |
* a.serialize(&myRootObject); |
1028 |
* @endcode |
1029 |
* Or: |
1030 |
* @code |
1031 |
* Archive a; |
1032 |
* a << myRootObject; |
1033 |
* @endcode |
1034 |
* Or you might also subsequently assign an already existing non-empty |
1035 |
* to this empty archive, which effectively clones the other |
1036 |
* archive (deep copy) or call decode() later on to assign a previously |
1037 |
* serialized raw data stream. |
1038 |
*/ |
1039 |
Archive::Archive() { |
1040 |
m_operation = OPERATION_NONE; |
1041 |
m_root = NO_UID; |
1042 |
m_isModified = false; |
1043 |
m_timeCreated = m_timeModified = LIBGIG_EPOCH_TIME; |
1044 |
} |
1045 |
|
1046 |
/** @brief Create and fill the archive with the given serialized raw data. |
1047 |
* |
1048 |
* This constructor decodes the given raw @a data and constructs a |
1049 |
* (non-empty) Archive object according to that given serialized data |
1050 |
* stream. |
1051 |
* |
1052 |
* After this constructor returned, you may then traverse the individual |
1053 |
* objects by starting with accessing the rootObject() for example. Finally |
1054 |
* you might call deserialize() to restore your native C++ objects with the |
1055 |
* content of this archive. |
1056 |
* |
1057 |
* @param data - the previously serialized raw data stream to be decoded |
1058 |
* @throws Exception if the provided raw @a data uses an invalid, unknown, |
1059 |
* incompatible or corrupt data stream or format. |
1060 |
*/ |
1061 |
Archive::Archive(const RawData& data) { |
1062 |
m_operation = OPERATION_NONE; |
1063 |
m_root = NO_UID; |
1064 |
m_isModified = false; |
1065 |
m_timeCreated = m_timeModified = LIBGIG_EPOCH_TIME; |
1066 |
decode(m_rawData); |
1067 |
} |
1068 |
|
1069 |
/** @brief Create and fill the archive with the given serialized raw C-buffer data. |
1070 |
* |
1071 |
* This constructor essentially works like the constructor above, but just |
1072 |
* uses another data type for the serialized raw data stream being passed to |
1073 |
* this class. |
1074 |
* |
1075 |
* This constructor decodes the given raw @a data and constructs a |
1076 |
* (non-empty) Archive object according to that given serialized data |
1077 |
* stream. |
1078 |
* |
1079 |
* After this constructor returned, you may then traverse the individual |
1080 |
* objects by starting with accessing the rootObject() for example. Finally |
1081 |
* you might call deserialize() to restore your native C++ objects with the |
1082 |
* content of this archive. |
1083 |
* |
1084 |
* @param data - the previously serialized raw data stream to be decoded |
1085 |
* @param size - size of @a data in bytes |
1086 |
* @throws Exception if the provided raw @a data uses an invalid, unknown, |
1087 |
* incompatible or corrupt data stream or format. |
1088 |
*/ |
1089 |
Archive::Archive(const uint8_t* data, size_t size) { |
1090 |
m_operation = OPERATION_NONE; |
1091 |
m_root = NO_UID; |
1092 |
m_isModified = false; |
1093 |
m_timeCreated = m_timeModified = LIBGIG_EPOCH_TIME; |
1094 |
decode(data, size); |
1095 |
} |
1096 |
|
1097 |
Archive::~Archive() { |
1098 |
} |
1099 |
|
1100 |
/** @brief Root C++ object of this archive. |
1101 |
* |
1102 |
* In case this is a non-empty Archive, then this method returns the so |
1103 |
* called "root" C++ object. If this is an empty archive, then this method |
1104 |
* returns an "invalid" Object instance instead. |
1105 |
* |
1106 |
* @see Archive::serialize() for more details about the "root" object concept. |
1107 |
* @see Object for more details about the overall object reflection concept. |
1108 |
* @returns reflection of the original native C++ root object |
1109 |
*/ |
1110 |
Object& Archive::rootObject() { |
1111 |
return m_allObjects[m_root]; |
1112 |
} |
1113 |
|
1114 |
static String _encodeBlob(String data) { |
1115 |
return ToString(data.length()) + ":" + data; |
1116 |
} |
1117 |
|
1118 |
static String _encode(const UID& uid) { |
1119 |
String s; |
1120 |
s += _encodeBlob(ToString(size_t(uid.id))); |
1121 |
s += _encodeBlob(ToString(size_t(uid.size))); |
1122 |
return _encodeBlob(s); |
1123 |
} |
1124 |
|
1125 |
static String _encode(const time_t& time) { |
1126 |
return _encodeBlob(ToString(time)); |
1127 |
} |
1128 |
|
1129 |
static String _encode(const DataType& type) { |
1130 |
String s; |
1131 |
s += _encodeBlob(type.baseTypeName()); |
1132 |
s += _encodeBlob(type.customTypeName()); |
1133 |
s += _encodeBlob(ToString(type.size())); |
1134 |
s += _encodeBlob(ToString(type.isPointer())); |
1135 |
return _encodeBlob(s); |
1136 |
} |
1137 |
|
1138 |
static String _encode(const UIDChain& chain) { |
1139 |
String s; |
1140 |
for (int i = 0; i < chain.size(); ++i) |
1141 |
s += _encode(chain[i]); |
1142 |
return _encodeBlob(s); |
1143 |
} |
1144 |
|
1145 |
static String _encode(const Member& member) { |
1146 |
String s; |
1147 |
s += _encode(member.uid()); |
1148 |
s += _encodeBlob(ToString(member.offset())); |
1149 |
s += _encodeBlob(member.name()); |
1150 |
s += _encode(member.type()); |
1151 |
return _encodeBlob(s); |
1152 |
} |
1153 |
|
1154 |
static String _encode(const std::vector<Member>& members) { |
1155 |
String s; |
1156 |
for (int i = 0; i < members.size(); ++i) |
1157 |
s += _encode(members[i]); |
1158 |
return _encodeBlob(s); |
1159 |
} |
1160 |
|
1161 |
static String _primitiveObjectValueToString(const Object& obj) { |
1162 |
String s; |
1163 |
const DataType& type = obj.type(); |
1164 |
const ID& id = obj.uid().id; |
1165 |
void* ptr = obj.m_data.empty() ? (void*)id : (void*)&obj.m_data[0]; |
1166 |
if (!obj.m_data.empty()) |
1167 |
assert(type.size() == obj.m_data.size()); |
1168 |
if (type.isPrimitive() && !type.isPointer()) { |
1169 |
if (type.isInteger() || type.isEnum()) { |
1170 |
if (type.isSigned()) { |
1171 |
if (type.size() == 1) |
1172 |
s = ToString((int16_t)*(int8_t*)ptr); // int16_t: prevent ToString() to render an ASCII character |
1173 |
else if (type.size() == 2) |
1174 |
s = ToString(*(int16_t*)ptr); |
1175 |
else if (type.size() == 4) |
1176 |
s = ToString(*(int32_t*)ptr); |
1177 |
else if (type.size() == 8) |
1178 |
s = ToString(*(int64_t*)ptr); |
1179 |
else |
1180 |
assert(false /* unknown signed int type size */); |
1181 |
} else { |
1182 |
if (type.size() == 1) |
1183 |
s = ToString((uint16_t)*(uint8_t*)ptr); // uint16_t: prevent ToString() to render an ASCII character |
1184 |
else if (type.size() == 2) |
1185 |
s = ToString(*(uint16_t*)ptr); |
1186 |
else if (type.size() == 4) |
1187 |
s = ToString(*(uint32_t*)ptr); |
1188 |
else if (type.size() == 8) |
1189 |
s = ToString(*(uint64_t*)ptr); |
1190 |
else |
1191 |
assert(false /* unknown unsigned int type size */); |
1192 |
} |
1193 |
} else if (type.isReal()) { |
1194 |
if (type.size() == sizeof(float)) |
1195 |
s = ToString(*(float*)ptr); |
1196 |
else if (type.size() == sizeof(double)) |
1197 |
s = ToString(*(double*)ptr); |
1198 |
else |
1199 |
assert(false /* unknown floating point type */); |
1200 |
} else if (type.isBool()) { |
1201 |
s = ToString(*(bool*)ptr); |
1202 |
} else { |
1203 |
assert(false /* unknown primitive type */); |
1204 |
} |
1205 |
|
1206 |
} |
1207 |
return s; |
1208 |
} |
1209 |
|
1210 |
template<typename T> |
1211 |
static T _primitiveObjectValueToNumber(const Object& obj) { |
1212 |
T value = 0; |
1213 |
const DataType& type = obj.type(); |
1214 |
const ID& id = obj.uid().id; |
1215 |
void* ptr = obj.m_data.empty() ? (void*)id : (void*)&obj.m_data[0]; |
1216 |
if (!obj.m_data.empty()) |
1217 |
assert(type.size() == obj.m_data.size()); |
1218 |
if (type.isPrimitive() && !type.isPointer()) { |
1219 |
if (type.isInteger() || type.isEnum()) { |
1220 |
if (type.isSigned()) { |
1221 |
if (type.size() == 1) |
1222 |
value = (T)*(int8_t*)ptr; |
1223 |
else if (type.size() == 2) |
1224 |
value = (T)*(int16_t*)ptr; |
1225 |
else if (type.size() == 4) |
1226 |
value = (T)*(int32_t*)ptr; |
1227 |
else if (type.size() == 8) |
1228 |
value = (T)*(int64_t*)ptr; |
1229 |
else |
1230 |
assert(false /* unknown signed int type size */); |
1231 |
} else { |
1232 |
if (type.size() == 1) |
1233 |
value = (T)*(uint8_t*)ptr; |
1234 |
else if (type.size() == 2) |
1235 |
value = (T)*(uint16_t*)ptr; |
1236 |
else if (type.size() == 4) |
1237 |
value = (T)*(uint32_t*)ptr; |
1238 |
else if (type.size() == 8) |
1239 |
value = (T)*(uint64_t*)ptr; |
1240 |
else |
1241 |
assert(false /* unknown unsigned int type size */); |
1242 |
} |
1243 |
} else if (type.isReal()) { |
1244 |
if (type.size() == sizeof(float)) |
1245 |
value = (T)*(float*)ptr; |
1246 |
else if (type.size() == sizeof(double)) |
1247 |
value = (T)*(double*)ptr; |
1248 |
else |
1249 |
assert(false /* unknown floating point type */); |
1250 |
} else if (type.isBool()) { |
1251 |
value = (T)*(bool*)ptr; |
1252 |
} else { |
1253 |
assert(false /* unknown primitive type */); |
1254 |
} |
1255 |
} |
1256 |
return value; |
1257 |
} |
1258 |
|
1259 |
static String _encodePrimitiveValue(const Object& obj) { |
1260 |
return _encodeBlob( _primitiveObjectValueToString(obj) ); |
1261 |
} |
1262 |
|
1263 |
static String _encode(const Object& obj) { |
1264 |
String s; |
1265 |
s += _encode(obj.type()); |
1266 |
s += _encodeBlob(ToString(obj.version())); |
1267 |
s += _encodeBlob(ToString(obj.minVersion())); |
1268 |
s += _encode(obj.uidChain()); |
1269 |
s += _encode(obj.members()); |
1270 |
s += _encodePrimitiveValue(obj); |
1271 |
return _encodeBlob(s); |
1272 |
} |
1273 |
|
1274 |
String _encode(const Archive::ObjectPool& objects) { |
1275 |
String s; |
1276 |
for (Archive::ObjectPool::const_iterator itObject = objects.begin(); |
1277 |
itObject != objects.end(); ++itObject) |
1278 |
{ |
1279 |
const Object& obj = itObject->second; |
1280 |
s += _encode(obj); |
1281 |
} |
1282 |
return _encodeBlob(s); |
1283 |
} |
1284 |
|
1285 |
#define MAGIC_START "Srx1v" |
1286 |
#define ENCODING_FORMAT_MINOR_VERSION 0 |
1287 |
|
1288 |
String Archive::_encodeRootBlob() { |
1289 |
String s; |
1290 |
s += _encodeBlob(ToString(ENCODING_FORMAT_MINOR_VERSION)); |
1291 |
s += _encode(m_root); |
1292 |
s += _encode(m_allObjects); |
1293 |
s += _encodeBlob(m_name); |
1294 |
s += _encodeBlob(m_comment); |
1295 |
s += _encode(m_timeCreated); |
1296 |
s += _encode(m_timeModified); |
1297 |
return _encodeBlob(s); |
1298 |
} |
1299 |
|
1300 |
void Archive::encode() { |
1301 |
m_rawData.clear(); |
1302 |
String s = MAGIC_START; |
1303 |
m_timeModified = time(NULL); |
1304 |
if (m_timeCreated == LIBGIG_EPOCH_TIME) |
1305 |
m_timeCreated = m_timeModified; |
1306 |
s += _encodeRootBlob(); |
1307 |
m_rawData.resize(s.length() + 1); |
1308 |
memcpy(&m_rawData[0], &s[0], s.length() + 1); |
1309 |
m_isModified = false; |
1310 |
} |
1311 |
|
1312 |
struct _Blob { |
1313 |
const char* p; |
1314 |
const char* end; |
1315 |
}; |
1316 |
|
1317 |
static _Blob _decodeBlob(const char* p, const char* end, bool bThrow = true) { |
1318 |
if (!bThrow && p >= end) { |
1319 |
const _Blob blob = { p, end }; |
1320 |
return blob; |
1321 |
} |
1322 |
size_t sz = 0; |
1323 |
for (; true; ++p) { |
1324 |
if (p >= end) |
1325 |
throw Exception("Decode Error: Missing blob"); |
1326 |
const char& c = *p; |
1327 |
if (c == ':') break; |
1328 |
if (c < '0' || c > '9') |
1329 |
throw Exception("Decode Error: Missing blob size"); |
1330 |
sz *= 10; |
1331 |
sz += size_t(c - '0'); |
1332 |
} |
1333 |
++p; |
1334 |
if (p + sz > end) |
1335 |
throw Exception("Decode Error: Premature end of blob"); |
1336 |
const _Blob blob = { p, p + sz }; |
1337 |
return blob; |
1338 |
} |
1339 |
|
1340 |
template<typename T_int> |
1341 |
static T_int _popIntBlob(const char*& p, const char* end) { |
1342 |
_Blob blob = _decodeBlob(p, end); |
1343 |
p = blob.p; |
1344 |
end = blob.end; |
1345 |
|
1346 |
T_int sign = 1; |
1347 |
T_int i = 0; |
1348 |
if (p >= end) |
1349 |
throw Exception("Decode Error: premature end of int blob"); |
1350 |
if (*p == '-') { |
1351 |
sign = -1; |
1352 |
++p; |
1353 |
} |
1354 |
for (; p < end; ++p) { |
1355 |
const char& c = *p; |
1356 |
if (c < '0' || c > '9') |
1357 |
throw Exception("Decode Error: Invalid int blob format"); |
1358 |
i *= 10; |
1359 |
i += size_t(c - '0'); |
1360 |
} |
1361 |
return i * sign; |
1362 |
} |
1363 |
|
1364 |
template<typename T_int> |
1365 |
static void _popIntBlob(const char*& p, const char* end, RawData& rawData) { |
1366 |
const T_int i = _popIntBlob<T_int>(p, end); |
1367 |
*(T_int*)&rawData[0] = i; |
1368 |
} |
1369 |
|
1370 |
template<typename T_real> |
1371 |
static T_real _popRealBlob(const char*& p, const char* end) { |
1372 |
_Blob blob = _decodeBlob(p, end); |
1373 |
p = blob.p; |
1374 |
end = blob.end; |
1375 |
|
1376 |
if (p >= end || (end - p) < 1) |
1377 |
throw Exception("Decode Error: premature end of real blob"); |
1378 |
|
1379 |
String s(p, size_t(end - p)); |
1380 |
|
1381 |
T_real r; |
1382 |
if (sizeof(T_real) <= sizeof(double)) |
1383 |
r = atof(s.c_str()); |
1384 |
else |
1385 |
assert(false /* unknown real type */); |
1386 |
|
1387 |
p += s.length(); |
1388 |
|
1389 |
return r; |
1390 |
} |
1391 |
|
1392 |
template<typename T_real> |
1393 |
static void _popRealBlob(const char*& p, const char* end, RawData& rawData) { |
1394 |
const T_real r = _popRealBlob<T_real>(p, end); |
1395 |
*(T_real*)&rawData[0] = r; |
1396 |
} |
1397 |
|
1398 |
static String _popStringBlob(const char*& p, const char* end) { |
1399 |
_Blob blob = _decodeBlob(p, end); |
1400 |
p = blob.p; |
1401 |
end = blob.end; |
1402 |
if (end - p < 0) |
1403 |
throw Exception("Decode Error: missing String blob"); |
1404 |
String s; |
1405 |
const size_t sz = end - p; |
1406 |
s.resize(sz); |
1407 |
memcpy(&s[0], p, sz); |
1408 |
p += sz; |
1409 |
return s; |
1410 |
} |
1411 |
|
1412 |
static time_t _popTimeBlob(const char*& p, const char* end) { |
1413 |
const uint64_t i = _popIntBlob<uint64_t>(p, end); |
1414 |
return (time_t) i; |
1415 |
} |
1416 |
|
1417 |
DataType _popDataTypeBlob(const char*& p, const char* end) { |
1418 |
_Blob blob = _decodeBlob(p, end); |
1419 |
p = blob.p; |
1420 |
end = blob.end; |
1421 |
|
1422 |
DataType type; |
1423 |
type.m_baseTypeName = _popStringBlob(p, end); |
1424 |
type.m_customTypeName = _popStringBlob(p, end); |
1425 |
type.m_size = _popIntBlob<int>(p, end); |
1426 |
type.m_isPointer = _popIntBlob<bool>(p, end); |
1427 |
return type; |
1428 |
} |
1429 |
|
1430 |
static UID _popUIDBlob(const char*& p, const char* end) { |
1431 |
_Blob blob = _decodeBlob(p, end); |
1432 |
p = blob.p; |
1433 |
end = blob.end; |
1434 |
|
1435 |
if (p >= end) |
1436 |
throw Exception("Decode Error: premature end of UID blob"); |
1437 |
|
1438 |
const ID id = (ID) _popIntBlob<size_t>(p, end); |
1439 |
const size_t size = _popIntBlob<size_t>(p, end); |
1440 |
|
1441 |
const UID uid = { id, size }; |
1442 |
return uid; |
1443 |
} |
1444 |
|
1445 |
static UIDChain _popUIDChainBlob(const char*& p, const char* end) { |
1446 |
_Blob blob = _decodeBlob(p, end); |
1447 |
p = blob.p; |
1448 |
end = blob.end; |
1449 |
|
1450 |
UIDChain chain; |
1451 |
while (p < end) { |
1452 |
const UID uid = _popUIDBlob(p, end); |
1453 |
chain.push_back(uid); |
1454 |
} |
1455 |
assert(!chain.empty()); |
1456 |
return chain; |
1457 |
} |
1458 |
|
1459 |
static Member _popMemberBlob(const char*& p, const char* end) { |
1460 |
_Blob blob = _decodeBlob(p, end, false); |
1461 |
p = blob.p; |
1462 |
end = blob.end; |
1463 |
|
1464 |
Member m; |
1465 |
if (p >= end) return m; |
1466 |
|
1467 |
m.m_uid = _popUIDBlob(p, end); |
1468 |
m.m_offset = _popIntBlob<size_t>(p, end); |
1469 |
m.m_name = _popStringBlob(p, end); |
1470 |
m.m_type = _popDataTypeBlob(p, end); |
1471 |
assert(m.type()); |
1472 |
assert(!m.name().empty()); |
1473 |
assert(m.uid().isValid()); |
1474 |
return m; |
1475 |
} |
1476 |
|
1477 |
static std::vector<Member> _popMembersBlob(const char*& p, const char* end) { |
1478 |
_Blob blob = _decodeBlob(p, end, false); |
1479 |
p = blob.p; |
1480 |
end = blob.end; |
1481 |
|
1482 |
std::vector<Member> members; |
1483 |
while (p < end) { |
1484 |
const Member member = _popMemberBlob(p, end); |
1485 |
if (member) |
1486 |
members.push_back(member); |
1487 |
else |
1488 |
break; |
1489 |
} |
1490 |
return members; |
1491 |
} |
1492 |
|
1493 |
static void _popPrimitiveValue(const char*& p, const char* end, Object& obj) { |
1494 |
const DataType& type = obj.type(); |
1495 |
if (type.isPrimitive() && !type.isPointer()) { |
1496 |
obj.m_data.resize(type.size()); |
1497 |
if (type.isInteger() || type.isEnum()) { |
1498 |
if (type.isSigned()) { |
1499 |
if (type.size() == 1) |
1500 |
_popIntBlob<int8_t>(p, end, obj.m_data); |
1501 |
else if (type.size() == 2) |
1502 |
_popIntBlob<int16_t>(p, end, obj.m_data); |
1503 |
else if (type.size() == 4) |
1504 |
_popIntBlob<int32_t>(p, end, obj.m_data); |
1505 |
else if (type.size() == 8) |
1506 |
_popIntBlob<int64_t>(p, end, obj.m_data); |
1507 |
else |
1508 |
assert(false /* unknown signed int type size */); |
1509 |
} else { |
1510 |
if (type.size() == 1) |
1511 |
_popIntBlob<uint8_t>(p, end, obj.m_data); |
1512 |
else if (type.size() == 2) |
1513 |
_popIntBlob<uint16_t>(p, end, obj.m_data); |
1514 |
else if (type.size() == 4) |
1515 |
_popIntBlob<uint32_t>(p, end, obj.m_data); |
1516 |
else if (type.size() == 8) |
1517 |
_popIntBlob<uint64_t>(p, end, obj.m_data); |
1518 |
else |
1519 |
assert(false /* unknown unsigned int type size */); |
1520 |
} |
1521 |
} else if (type.isReal()) { |
1522 |
if (type.size() == sizeof(float)) |
1523 |
_popRealBlob<float>(p, end, obj.m_data); |
1524 |
else if (type.size() == sizeof(double)) |
1525 |
_popRealBlob<double>(p, end, obj.m_data); |
1526 |
else |
1527 |
assert(false /* unknown floating point type */); |
1528 |
} else if (type.isBool()) { |
1529 |
_popIntBlob<uint8_t>(p, end, obj.m_data); |
1530 |
} else { |
1531 |
assert(false /* unknown primitive type */); |
1532 |
} |
1533 |
|
1534 |
} else { |
1535 |
// don't whine if the empty blob was not added on encoder side |
1536 |
_Blob blob = _decodeBlob(p, end, false); |
1537 |
p = blob.p; |
1538 |
end = blob.end; |
1539 |
} |
1540 |
} |
1541 |
|
1542 |
static Object _popObjectBlob(const char*& p, const char* end) { |
1543 |
_Blob blob = _decodeBlob(p, end, false); |
1544 |
p = blob.p; |
1545 |
end = blob.end; |
1546 |
|
1547 |
Object obj; |
1548 |
if (p >= end) return obj; |
1549 |
|
1550 |
obj.m_type = _popDataTypeBlob(p, end); |
1551 |
obj.m_version = _popIntBlob<Version>(p, end); |
1552 |
obj.m_minVersion = _popIntBlob<Version>(p, end); |
1553 |
obj.m_uid = _popUIDChainBlob(p, end); |
1554 |
obj.m_members = _popMembersBlob(p, end); |
1555 |
_popPrimitiveValue(p, end, obj); |
1556 |
assert(obj.type()); |
1557 |
return obj; |
1558 |
} |
1559 |
|
1560 |
void Archive::_popObjectsBlob(const char*& p, const char* end) { |
1561 |
_Blob blob = _decodeBlob(p, end, false); |
1562 |
p = blob.p; |
1563 |
end = blob.end; |
1564 |
|
1565 |
if (p >= end) |
1566 |
throw Exception("Decode Error: Premature end of objects blob"); |
1567 |
|
1568 |
while (true) { |
1569 |
const Object obj = _popObjectBlob(p, end); |
1570 |
if (!obj) break; |
1571 |
m_allObjects[obj.uid()] = obj; |
1572 |
} |
1573 |
} |
1574 |
|
1575 |
void Archive::_popRootBlob(const char*& p, const char* end) { |
1576 |
_Blob blob = _decodeBlob(p, end, false); |
1577 |
p = blob.p; |
1578 |
end = blob.end; |
1579 |
|
1580 |
if (p >= end) |
1581 |
throw Exception("Decode Error: Premature end of root blob"); |
1582 |
|
1583 |
// just in case this encoding format will be extended in future |
1584 |
// (currently not used) |
1585 |
const int formatMinorVersion = _popIntBlob<int>(p, end); |
1586 |
|
1587 |
m_root = _popUIDBlob(p, end); |
1588 |
if (!m_root) |
1589 |
throw Exception("Decode Error: No root object"); |
1590 |
|
1591 |
_popObjectsBlob(p, end); |
1592 |
if (!m_allObjects[m_root]) |
1593 |
throw Exception("Decode Error: Missing declared root object"); |
1594 |
|
1595 |
m_name = _popStringBlob(p, end); |
1596 |
m_comment = _popStringBlob(p, end); |
1597 |
m_timeCreated = _popTimeBlob(p, end); |
1598 |
m_timeModified = _popTimeBlob(p, end); |
1599 |
} |
1600 |
|
1601 |
/** @brief Fill this archive with the given serialized raw data. |
1602 |
* |
1603 |
* Calling this method will decode the given raw @a data and constructs a |
1604 |
* (non-empty) Archive object according to that given serialized @a data |
1605 |
* stream. |
1606 |
* |
1607 |
* After this method returned, you may then traverse the individual |
1608 |
* objects by starting with accessing the rootObject() for example. Finally |
1609 |
* you might call deserialize() to restore your native C++ objects with the |
1610 |
* content of this archive. |
1611 |
* |
1612 |
* @param data - the previously serialized raw data stream to be decoded |
1613 |
* @throws Exception if the provided raw @a data uses an invalid, unknown, |
1614 |
* incompatible or corrupt data stream or format. |
1615 |
*/ |
1616 |
void Archive::decode(const RawData& data) { |
1617 |
m_rawData = data; |
1618 |
m_allObjects.clear(); |
1619 |
m_isModified = false; |
1620 |
m_timeCreated = m_timeModified = LIBGIG_EPOCH_TIME; |
1621 |
const char* p = (const char*) &data[0]; |
1622 |
const char* end = p + data.size(); |
1623 |
if (memcmp(p, MAGIC_START, std::min(strlen(MAGIC_START), data.size()))) |
1624 |
throw Exception("Decode Error: Magic start missing!"); |
1625 |
p += strlen(MAGIC_START); |
1626 |
_popRootBlob(p, end); |
1627 |
} |
1628 |
|
1629 |
/** @brief Fill this archive with the given serialized raw C-buffer data. |
1630 |
* |
1631 |
* This method essentially works like the decode() method above, but just |
1632 |
* uses another data type for the serialized raw data stream being passed to |
1633 |
* this method. |
1634 |
* |
1635 |
* Calling this method will decode the given raw @a data and constructs a |
1636 |
* (non-empty) Archive object according to that given serialized @a data |
1637 |
* stream. |
1638 |
* |
1639 |
* After this method returned, you may then traverse the individual |
1640 |
* objects by starting with accessing the rootObject() for example. Finally |
1641 |
* you might call deserialize() to restore your native C++ objects with the |
1642 |
* content of this archive. |
1643 |
* |
1644 |
* @param data - the previously serialized raw data stream to be decoded |
1645 |
* @param size - size of @a data in bytes |
1646 |
* @throws Exception if the provided raw @a data uses an invalid, unknown, |
1647 |
* incompatible or corrupt data stream or format. |
1648 |
*/ |
1649 |
void Archive::decode(const uint8_t* data, size_t size) { |
1650 |
RawData rawData; |
1651 |
rawData.resize(size); |
1652 |
memcpy(&rawData[0], data, size); |
1653 |
decode(rawData); |
1654 |
} |
1655 |
|
1656 |
/** @brief Raw data stream of this archive content. |
1657 |
* |
1658 |
* Call this method to get a raw data stream for the current content of this |
1659 |
* archive, which you may use to i.e. store on disk or send vie network to |
1660 |
* another machine for deserializing there. This method only returns a |
1661 |
* meaningful content if this is a non-empty archive, that is if you either |
1662 |
* serialized with this Archive object or decoded a raw data stream to this |
1663 |
* Archive object before. If this is an empty archive instead, then this |
1664 |
* method simply returns an empty raw data stream (of size 0) instead. |
1665 |
* |
1666 |
* Note that whenever you call this method, the "modified" state of this |
1667 |
* archive will be reset to @c false. |
1668 |
* |
1669 |
* @see isModified() |
1670 |
*/ |
1671 |
const RawData& Archive::rawData() { |
1672 |
if (m_isModified) encode(); |
1673 |
return m_rawData; |
1674 |
} |
1675 |
|
1676 |
/** @brief Name of the encoding format used by this Archive class. |
1677 |
* |
1678 |
* This method returns the name of the encoding format used to encode |
1679 |
* serialized raw data streams. |
1680 |
*/ |
1681 |
String Archive::rawDataFormat() const { |
1682 |
return MAGIC_START; |
1683 |
} |
1684 |
|
1685 |
/** @brief Whether this archive was modified. |
1686 |
* |
1687 |
* This method returns the current "modified" state of this archive. When |
1688 |
* either decoding a previously serialized raw data stream or after |
1689 |
* serializing native C++ objects to this archive the modified state will |
1690 |
* initially be set to @c false. However whenever you are modifying the |
1691 |
* abstract data model of this archive afterwards, for example by removing |
1692 |
* objects from this archive by calling remove() or removeMember(), or by |
1693 |
* altering object values for example by calling setIntValue(), then the |
1694 |
* "modified" state of this archive will automatically be set to @c true. |
1695 |
* |
1696 |
* You can reset the "modified" state explicitly at any time, by calling |
1697 |
* rawData(). |
1698 |
*/ |
1699 |
bool Archive::isModified() const { |
1700 |
return m_isModified; |
1701 |
} |
1702 |
|
1703 |
/** @brief Clear content of this archive. |
1704 |
* |
1705 |
* Drops the entire content of this archive and thus resets this archive |
1706 |
* back to become an empty archive. |
1707 |
*/ |
1708 |
void Archive::clear() { |
1709 |
m_allObjects.clear(); |
1710 |
m_operation = OPERATION_NONE; |
1711 |
m_root = NO_UID; |
1712 |
m_rawData.clear(); |
1713 |
m_isModified = false; |
1714 |
m_timeCreated = m_timeModified = LIBGIG_EPOCH_TIME; |
1715 |
} |
1716 |
|
1717 |
/** @brief Optional name of this archive. |
1718 |
* |
1719 |
* Returns the optional name of this archive that you might have assigned |
1720 |
* to this archive before by calling setName(). If you haven't assigned any |
1721 |
* name to this archive before, then this method simply returns an empty |
1722 |
* string instead. |
1723 |
*/ |
1724 |
String Archive::name() const { |
1725 |
return m_name; |
1726 |
} |
1727 |
|
1728 |
/** @brief Assign a name to this archive. |
1729 |
* |
1730 |
* You may optionally assign an arbitrary name to this archive. The name |
1731 |
* will be stored along with the archive, that is it will encoded with the |
1732 |
* resulting raw data stream, and accordingly it will be decoded from the |
1733 |
* raw data stream later on. |
1734 |
* |
1735 |
* @param name - arbitrary new name for this archive |
1736 |
*/ |
1737 |
void Archive::setName(String name) { |
1738 |
if (m_name == name) return; |
1739 |
m_name = name; |
1740 |
m_isModified = true; |
1741 |
} |
1742 |
|
1743 |
/** @brief Optional comments for this archive. |
1744 |
* |
1745 |
* Returns the optional comments for this archive that you might have |
1746 |
* assigned to this archive before by calling setComment(). If you haven't |
1747 |
* assigned any comment to this archive before, then this method simply |
1748 |
* returns an empty string instead. |
1749 |
*/ |
1750 |
String Archive::comment() const { |
1751 |
return m_comment; |
1752 |
} |
1753 |
|
1754 |
/** @brief Assign a comment to this archive. |
1755 |
* |
1756 |
* You may optionally assign arbitrary comments to this archive. The comment |
1757 |
* will be stored along with the archive, that is it will encoded with the |
1758 |
* resulting raw data stream, and accordingly it will be decoded from the |
1759 |
* raw data stream later on. |
1760 |
* |
1761 |
* @param comment - arbitrary new comment for this archive |
1762 |
*/ |
1763 |
void Archive::setComment(String comment) { |
1764 |
if (m_comment == comment) return; |
1765 |
m_comment = comment; |
1766 |
m_isModified = true; |
1767 |
} |
1768 |
|
1769 |
static tm _convertTimeStamp(const time_t& time, time_base_t base) { |
1770 |
tm* pTm; |
1771 |
switch (base) { |
1772 |
case LOCAL_TIME: |
1773 |
pTm = localtime(&time); |
1774 |
break; |
1775 |
case UTC_TIME: |
1776 |
pTm = gmtime(&time); |
1777 |
break; |
1778 |
default: |
1779 |
throw Exception("Time stamp with unknown time base (" + ToString((int64_t)base) + ") requested"); |
1780 |
} |
1781 |
if (!pTm) |
1782 |
throw Exception("Failed assembling time stamp structure"); |
1783 |
return *pTm; |
1784 |
} |
1785 |
|
1786 |
/** @brief Date and time when this archive was initially created. |
1787 |
* |
1788 |
* Returns a UTC time stamp (date and time) when this archive was initially |
1789 |
* created. |
1790 |
*/ |
1791 |
time_t Archive::timeStampCreated() const { |
1792 |
return m_timeCreated; |
1793 |
} |
1794 |
|
1795 |
/** @brief Date and time when this archive was modified for the last time. |
1796 |
* |
1797 |
* Returns a UTC time stamp (date and time) when this archive was modified |
1798 |
* for the last time. |
1799 |
*/ |
1800 |
time_t Archive::timeStampModified() const { |
1801 |
return m_timeModified; |
1802 |
} |
1803 |
|
1804 |
/** @brief Date and time when this archive was initially created. |
1805 |
* |
1806 |
* Returns a calendar time information representing the date and time when |
1807 |
* this archive was initially created. The optional @a base parameter may |
1808 |
* be used to define to which time zone the returned data and time shall be |
1809 |
* related to. |
1810 |
* |
1811 |
* @param base - (optional) time zone the result shall relate to, by default |
1812 |
* UTC time (Greenwhich Mean Time) is assumed instead |
1813 |
*/ |
1814 |
tm Archive::dateTimeCreated(time_base_t base) const { |
1815 |
return _convertTimeStamp(m_timeCreated, base); |
1816 |
} |
1817 |
|
1818 |
/** @brief Date and time when this archive was modified for the last time. |
1819 |
* |
1820 |
* Returns a calendar time information representing the date and time when |
1821 |
* this archive has been modified for the last time. The optional @a base |
1822 |
* parameter may be used to define to which time zone the returned date and |
1823 |
* time shall be related to. |
1824 |
* |
1825 |
* @param base - (optional) time zone the result shall relate to, by default |
1826 |
* UTC time (Greenwhich Mean Time) is assumed instead |
1827 |
*/ |
1828 |
tm Archive::dateTimeModified(time_base_t base) const { |
1829 |
return _convertTimeStamp(m_timeModified, base); |
1830 |
} |
1831 |
|
1832 |
/** @brief Remove a member variable from the given object. |
1833 |
* |
1834 |
* Removes the member variable @a member from its containing object |
1835 |
* @a parent and sets the modified state of this archive to @c true. |
1836 |
* If the given @a parent object does not contain the given @a member then |
1837 |
* this method does nothing. |
1838 |
* |
1839 |
* This method provides a means of "partial" deserialization. By removing |
1840 |
* either objects or members from this archive before calling deserialize(), |
1841 |
* only the remaining objects and remaining members will be restored by this |
1842 |
* framework, all other data of your C++ classes remain untouched. |
1843 |
* |
1844 |
* @param parent - Object which contains @a member |
1845 |
* @param member - member to be removed |
1846 |
* @see isModified() for details about the modified state. |
1847 |
* @see Object for more details about the overall object reflection concept. |
1848 |
*/ |
1849 |
void Archive::removeMember(Object& parent, const Member& member) { |
1850 |
parent.remove(member); |
1851 |
m_isModified = true; |
1852 |
} |
1853 |
|
1854 |
/** @brief Remove an object from this archive. |
1855 |
* |
1856 |
* Removes the object @obj from this archive and sets the modified state of |
1857 |
* this archive to @c true. If the passed object is either invalid, or does |
1858 |
* not exist in this archive, then this method does nothing. |
1859 |
* |
1860 |
* This method provides a means of "partial" deserialization. By removing |
1861 |
* either objects or members from this archive before calling deserialize(), |
1862 |
* only the remaining objects and remaining members will be restored by this |
1863 |
* framework, all other data of your C++ classes remain untouched. |
1864 |
* |
1865 |
* @param obj - the object to be removed from this archive |
1866 |
* @see isModified() for details about the modified state. |
1867 |
* @see Object for more details about the overall object reflection concept. |
1868 |
*/ |
1869 |
void Archive::remove(const Object& obj) { |
1870 |
//FIXME: Should traverse from root object and remove all members associated with this object |
1871 |
if (!obj.uid()) return; |
1872 |
m_allObjects.erase(obj.uid()); |
1873 |
m_isModified = true; |
1874 |
} |
1875 |
|
1876 |
/** @brief Access object by its unique identifier. |
1877 |
* |
1878 |
* Returns the object of this archive with the given unique identifier |
1879 |
* @a uid. If the given @a uid is invalid, or if this archive does not |
1880 |
* contain an object with the given unique identifier, then this method |
1881 |
* returns an invalid object instead. |
1882 |
* |
1883 |
* @param uid - unique identifier of sought object |
1884 |
* @see Object for more details about the overall object reflection concept. |
1885 |
* @see Object::isValid() for valid/invalid objects |
1886 |
*/ |
1887 |
Object& Archive::objectByUID(const UID& uid) { |
1888 |
return m_allObjects[uid]; |
1889 |
} |
1890 |
|
1891 |
/** @brief Set the current version for the given object. |
1892 |
* |
1893 |
* Essentially behaves like above's setVersion() method, it just uses the |
1894 |
* abstract reflection data type instead for the respective @a object being |
1895 |
* passed to this method. Refer to above's setVersion() documentation about |
1896 |
* the precise behavior details of setVersion(). |
1897 |
* |
1898 |
* @param object - object to set the current version for |
1899 |
* @param v - new current version to set for @a object |
1900 |
*/ |
1901 |
void Archive::setVersion(Object& object, Version v) { |
1902 |
if (!object) return; |
1903 |
object.setVersion(v); |
1904 |
m_isModified = true; |
1905 |
} |
1906 |
|
1907 |
/** @brief Set the minimum version for the given object. |
1908 |
* |
1909 |
* Essentially behaves like above's setMinVersion() method, it just uses the |
1910 |
* abstract reflection data type instead for the respective @a object being |
1911 |
* passed to this method. Refer to above's setMinVersion() documentation |
1912 |
* about the precise behavior details of setMinVersion(). |
1913 |
* |
1914 |
* @param object - object to set the minimum version for |
1915 |
* @param v - new minimum version to set for @a object |
1916 |
*/ |
1917 |
void Archive::setMinVersion(Object& object, Version v) { |
1918 |
if (!object) return; |
1919 |
object.setMinVersion(v); |
1920 |
m_isModified = true; |
1921 |
} |
1922 |
|
1923 |
/** @brief Set new value for given @c enum object. |
1924 |
* |
1925 |
* Sets the new @a value to the given @c enum @a object. |
1926 |
* |
1927 |
* @param object - the @c enum object to be changed |
1928 |
* @param value - the new value to be assigned to the @a object |
1929 |
* @throws Exception if @a object is not an @c enum type. |
1930 |
*/ |
1931 |
void Archive::setEnumValue(Object& object, uint64_t value) { |
1932 |
if (!object) return; |
1933 |
if (!object.type().isEnum()) |
1934 |
throw Exception("Not an enum data type"); |
1935 |
Object* pObject = &object; |
1936 |
if (object.type().isPointer()) { |
1937 |
Object& obj = objectByUID(object.uid(1)); |
1938 |
if (!obj) return; |
1939 |
pObject = &obj; |
1940 |
} |
1941 |
const int nativeEnumSize = sizeof(enum operation_t); |
1942 |
DataType& type = const_cast<DataType&>( pObject->type() ); |
1943 |
// original serializer ("sender") might have had a different word size |
1944 |
// than this machine, adjust type object in this case |
1945 |
if (type.size() != nativeEnumSize) { |
1946 |
type.m_size = nativeEnumSize; |
1947 |
} |
1948 |
pObject->m_data.resize(type.size()); |
1949 |
void* ptr = &pObject->m_data[0]; |
1950 |
if (type.size() == 1) |
1951 |
*(uint8_t*)ptr = (uint8_t)value; |
1952 |
else if (type.size() == 2) |
1953 |
*(uint16_t*)ptr = (uint16_t)value; |
1954 |
else if (type.size() == 4) |
1955 |
*(uint32_t*)ptr = (uint32_t)value; |
1956 |
else if (type.size() == 8) |
1957 |
*(uint64_t*)ptr = (uint64_t)value; |
1958 |
else |
1959 |
assert(false /* unknown enum type size */); |
1960 |
m_isModified = true; |
1961 |
} |
1962 |
|
1963 |
/** @brief Set new integer value for given integer object. |
1964 |
* |
1965 |
* Sets the new integer @a value to the given integer @a object. Currently |
1966 |
* this framework handles any integer data type up to 64 bit. For larger |
1967 |
* integer types an assertion failure will be raised. |
1968 |
* |
1969 |
* @param object - the integer object to be changed |
1970 |
* @param value - the new value to be assigned to the @a object |
1971 |
* @throws Exception if @a object is not an integer type. |
1972 |
*/ |
1973 |
void Archive::setIntValue(Object& object, int64_t value) { |
1974 |
if (!object) return; |
1975 |
if (!object.type().isInteger()) |
1976 |
throw Exception("Not an integer data type"); |
1977 |
Object* pObject = &object; |
1978 |
if (object.type().isPointer()) { |
1979 |
Object& obj = objectByUID(object.uid(1)); |
1980 |
if (!obj) return; |
1981 |
pObject = &obj; |
1982 |
} |
1983 |
const DataType& type = pObject->type(); |
1984 |
pObject->m_data.resize(type.size()); |
1985 |
void* ptr = &pObject->m_data[0]; |
1986 |
if (type.isSigned()) { |
1987 |
if (type.size() == 1) |
1988 |
*(int8_t*)ptr = (int8_t)value; |
1989 |
else if (type.size() == 2) |
1990 |
*(int16_t*)ptr = (int16_t)value; |
1991 |
else if (type.size() == 4) |
1992 |
*(int32_t*)ptr = (int32_t)value; |
1993 |
else if (type.size() == 8) |
1994 |
*(int64_t*)ptr = (int64_t)value; |
1995 |
else |
1996 |
assert(false /* unknown signed int type size */); |
1997 |
} else { |
1998 |
if (type.size() == 1) |
1999 |
*(uint8_t*)ptr = (uint8_t)value; |
2000 |
else if (type.size() == 2) |
2001 |
*(uint16_t*)ptr = (uint16_t)value; |
2002 |
else if (type.size() == 4) |
2003 |
*(uint32_t*)ptr = (uint32_t)value; |
2004 |
else if (type.size() == 8) |
2005 |
*(uint64_t*)ptr = (uint64_t)value; |
2006 |
else |
2007 |
assert(false /* unknown unsigned int type size */); |
2008 |
} |
2009 |
m_isModified = true; |
2010 |
} |
2011 |
|
2012 |
/** @brief Set new floating point value for given floating point object. |
2013 |
* |
2014 |
* Sets the new floating point @a value to the given floating point |
2015 |
* @a object. Currently this framework supports single precision @c float |
2016 |
* and double precision @c double floating point data types. For all other |
2017 |
* floating point types this method will raise an assertion failure. |
2018 |
* |
2019 |
* @param object - the floating point object to be changed |
2020 |
* @param value - the new value to be assigned to the @a object |
2021 |
* @throws Exception if @a object is not a floating point based type. |
2022 |
*/ |
2023 |
void Archive::setRealValue(Object& object, double value) { |
2024 |
if (!object) return; |
2025 |
if (!object.type().isReal()) |
2026 |
throw Exception("Not a real data type"); |
2027 |
Object* pObject = &object; |
2028 |
if (object.type().isPointer()) { |
2029 |
Object& obj = objectByUID(object.uid(1)); |
2030 |
if (!obj) return; |
2031 |
pObject = &obj; |
2032 |
} |
2033 |
const DataType& type = pObject->type(); |
2034 |
pObject->m_data.resize(type.size()); |
2035 |
void* ptr = &pObject->m_data[0]; |
2036 |
if (type.size() == sizeof(float)) |
2037 |
*(float*)ptr = (float)value; |
2038 |
else if (type.size() == sizeof(double)) |
2039 |
*(double*)ptr = (double)value; |
2040 |
else |
2041 |
assert(false /* unknown real type size */); |
2042 |
m_isModified = true; |
2043 |
} |
2044 |
|
2045 |
/** @brief Set new boolean value for given boolean object. |
2046 |
* |
2047 |
* Sets the new boolean @a value to the given boolean @a object. |
2048 |
* |
2049 |
* @param object - the boolean object to be changed |
2050 |
* @param value - the new value to be assigned to the @a object |
2051 |
* @throws Exception if @a object is not a boolean type. |
2052 |
*/ |
2053 |
void Archive::setBoolValue(Object& object, bool value) { |
2054 |
if (!object) return; |
2055 |
if (!object.type().isBool()) |
2056 |
throw Exception("Not a bool data type"); |
2057 |
Object* pObject = &object; |
2058 |
if (object.type().isPointer()) { |
2059 |
Object& obj = objectByUID(object.uid(1)); |
2060 |
if (!obj) return; |
2061 |
pObject = &obj; |
2062 |
} |
2063 |
const DataType& type = pObject->type(); |
2064 |
pObject->m_data.resize(type.size()); |
2065 |
bool* ptr = (bool*)&pObject->m_data[0]; |
2066 |
*ptr = value; |
2067 |
m_isModified = true; |
2068 |
} |
2069 |
|
2070 |
/** @brief Automatically cast and assign appropriate value to object. |
2071 |
* |
2072 |
* This method automatically converts the given @a value from textual string |
2073 |
* representation into the appropriate data format of the requested |
2074 |
* @a object. So this method is a convenient way to change values of objects |
2075 |
* in this archive with your applications in automated way, i.e. for |
2076 |
* implementing an editor where the user is able to edit values of objects |
2077 |
* in this archive by entering the values as text with a keyboard. |
2078 |
* |
2079 |
* @throws Exception if the passed @a object is not a fundamental, primitive |
2080 |
* data type or if the provided textual value cannot be converted |
2081 |
* into an appropriate value for the requested object. |
2082 |
*/ |
2083 |
void Archive::setAutoValue(Object& object, String value) { |
2084 |
if (!object) return; |
2085 |
const DataType& type = object.type(); |
2086 |
if (type.isInteger()) |
2087 |
setIntValue(object, atoll(value.c_str())); |
2088 |
else if (type.isReal()) |
2089 |
setRealValue(object, atof(value.c_str())); |
2090 |
else if (type.isBool()) { |
2091 |
String val = toLowerCase(value); |
2092 |
if (val == "true" || val == "yes" || val == "1") |
2093 |
setBoolValue(object, true); |
2094 |
else if (val == "false" || val == "no" || val == "0") |
2095 |
setBoolValue(object, false); |
2096 |
else |
2097 |
setBoolValue(object, atof(value.c_str())); |
2098 |
} else if (type.isEnum()) |
2099 |
setEnumValue(object, atoll(value.c_str())); |
2100 |
else |
2101 |
throw Exception("Not a primitive data type"); |
2102 |
} |
2103 |
|
2104 |
/** @brief Get value of object as string. |
2105 |
* |
2106 |
* Converts the current value of the given @a object into a textual string |
2107 |
* and returns that string. |
2108 |
* |
2109 |
* @param object - object whose value shall be retrieved |
2110 |
* @throws Exception if the given object is either invalid, or if the object |
2111 |
* is not a fundamental, primitive data type. |
2112 |
*/ |
2113 |
String Archive::valueAsString(const Object& object) { |
2114 |
if (!object) |
2115 |
throw Exception("Invalid object"); |
2116 |
if (object.type().isClass()) |
2117 |
throw Exception("Object is class type"); |
2118 |
const Object* pObject = &object; |
2119 |
if (object.type().isPointer()) { |
2120 |
const Object& obj = objectByUID(object.uid(1)); |
2121 |
if (!obj) return ""; |
2122 |
pObject = &obj; |
2123 |
} |
2124 |
return _primitiveObjectValueToString(*pObject); |
2125 |
} |
2126 |
|
2127 |
/** @brief Get integer value of object. |
2128 |
* |
2129 |
* Returns the current integer value of the requested integer @a object or |
2130 |
* @c enum object. |
2131 |
* |
2132 |
* @param object - object whose value shall be retrieved |
2133 |
* @throws Exception if the given object is either invalid, or if the object |
2134 |
* is neither an integer nor @c enum data type. |
2135 |
*/ |
2136 |
int64_t Archive::valueAsInt(const Object& object) { |
2137 |
if (!object) |
2138 |
throw Exception("Invalid object"); |
2139 |
if (!object.type().isInteger() && !object.type().isEnum()) |
2140 |
throw Exception("Object is neither an integer nor an enum"); |
2141 |
const Object* pObject = &object; |
2142 |
if (object.type().isPointer()) { |
2143 |
const Object& obj = objectByUID(object.uid(1)); |
2144 |
if (!obj) return 0; |
2145 |
pObject = &obj; |
2146 |
} |
2147 |
return _primitiveObjectValueToNumber<int64_t>(*pObject); |
2148 |
} |
2149 |
|
2150 |
/** @brief Get floating point value of object. |
2151 |
* |
2152 |
* Returns the current floating point value of the requested floating point |
2153 |
* @a object. |
2154 |
* |
2155 |
* @param object - object whose value shall be retrieved |
2156 |
* @throws Exception if the given object is either invalid, or if the object |
2157 |
* is not a floating point based type. |
2158 |
*/ |
2159 |
double Archive::valueAsReal(const Object& object) { |
2160 |
if (!object) |
2161 |
throw Exception("Invalid object"); |
2162 |
if (!object.type().isReal()) |
2163 |
throw Exception("Object is not an real type"); |
2164 |
const Object* pObject = &object; |
2165 |
if (object.type().isPointer()) { |
2166 |
const Object& obj = objectByUID(object.uid(1)); |
2167 |
if (!obj) return 0; |
2168 |
pObject = &obj; |
2169 |
} |
2170 |
return _primitiveObjectValueToNumber<double>(*pObject); |
2171 |
} |
2172 |
|
2173 |
/** @brief Get boolean value of object. |
2174 |
* |
2175 |
* Returns the current boolean value of the requested boolean @a object. |
2176 |
* |
2177 |
* @param object - object whose value shall be retrieved |
2178 |
* @throws Exception if the given object is either invalid, or if the object |
2179 |
* is not a boolean data type. |
2180 |
*/ |
2181 |
bool Archive::valueAsBool(const Object& object) { |
2182 |
if (!object) |
2183 |
throw Exception("Invalid object"); |
2184 |
if (!object.type().isBool()) |
2185 |
throw Exception("Object is not a bool"); |
2186 |
const Object* pObject = &object; |
2187 |
if (object.type().isPointer()) { |
2188 |
const Object& obj = objectByUID(object.uid(1)); |
2189 |
if (!obj) return 0; |
2190 |
pObject = &obj; |
2191 |
} |
2192 |
return _primitiveObjectValueToNumber<bool>(*pObject); |
2193 |
} |
2194 |
|
2195 |
// *************** Archive::Syncer *************** |
2196 |
// * |
2197 |
|
2198 |
Archive::Syncer::Syncer(Archive& dst, Archive& src) |
2199 |
: m_dst(dst), m_src(src) |
2200 |
{ |
2201 |
const Object srcRootObj = src.rootObject(); |
2202 |
const Object dstRootObj = dst.rootObject(); |
2203 |
if (!srcRootObj) |
2204 |
throw Exception("No source root object!"); |
2205 |
if (!dstRootObj) |
2206 |
throw Exception("Expected destination root object not found!"); |
2207 |
syncObject(dstRootObj, srcRootObj); |
2208 |
} |
2209 |
|
2210 |
void Archive::Syncer::syncPrimitive(const Object& dstObj, const Object& srcObj) { |
2211 |
assert(srcObj.rawData().size() == dstObj.type().size()); |
2212 |
void* pDst = (void*)dstObj.uid().id; |
2213 |
memcpy(pDst, &srcObj.rawData()[0], dstObj.type().size()); |
2214 |
} |
2215 |
|
2216 |
void Archive::Syncer::syncPointer(const Object& dstObj, const Object& srcObj) { |
2217 |
assert(dstObj.type().isPointer()); |
2218 |
assert(dstObj.type() == srcObj.type()); |
2219 |
const Object& pointedDstObject = m_dst.m_allObjects[dstObj.uid(1)]; |
2220 |
const Object& pointedSrcObject = m_src.m_allObjects[srcObj.uid(1)]; |
2221 |
syncObject(pointedDstObject, pointedSrcObject); |
2222 |
} |
2223 |
|
2224 |
void Archive::Syncer::syncObject(const Object& dstObj, const Object& srcObj) { |
2225 |
if (!dstObj || !srcObj) return; // end of recursion |
2226 |
if (!dstObj.isVersionCompatibleTo(srcObj)) |
2227 |
throw Exception("Version incompatible (destination version " + |
2228 |
ToString(dstObj.version()) + " [min. version " + |
2229 |
ToString(dstObj.minVersion()) + "], source version " + |
2230 |
ToString(srcObj.version()) + " [min. version " + |
2231 |
ToString(srcObj.minVersion()) + "])"); |
2232 |
if (dstObj.type() != srcObj.type()) |
2233 |
throw Exception("Incompatible data structure type (destination type " + |
2234 |
dstObj.type().asLongDescr() + " vs. source type " + |
2235 |
srcObj.type().asLongDescr() + ")"); |
2236 |
|
2237 |
// prevent syncing this object again, and thus also prevent endless |
2238 |
// loop on data structures with cyclic relations |
2239 |
m_dst.m_allObjects.erase(dstObj.uid()); |
2240 |
|
2241 |
if (dstObj.type().isPrimitive() && !dstObj.type().isPointer()) { |
2242 |
syncPrimitive(dstObj, srcObj); |
2243 |
return; // end of recursion |
2244 |
} |
2245 |
|
2246 |
if (dstObj.type().isPointer()) { |
2247 |
syncPointer(dstObj, srcObj); |
2248 |
return; |
2249 |
} |
2250 |
|
2251 |
assert(dstObj.type().isClass()); |
2252 |
for (int iMember = 0; iMember < srcObj.members().size(); ++iMember) { |
2253 |
const Member& srcMember = srcObj.members()[iMember]; |
2254 |
Member dstMember = dstMemberMatching(dstObj, srcObj, srcMember); |
2255 |
if (!dstMember) |
2256 |
throw Exception("Expected member missing in destination object"); |
2257 |
syncMember(dstMember, srcMember); |
2258 |
} |
2259 |
} |
2260 |
|
2261 |
Member Archive::Syncer::dstMemberMatching(const Object& dstObj, const Object& srcObj, const Member& srcMember) { |
2262 |
Member dstMember = dstObj.memberNamed(srcMember.name()); |
2263 |
if (dstMember) |
2264 |
return (dstMember.type() == srcMember.type()) ? dstMember : Member(); |
2265 |
std::vector<Member> members = dstObj.membersOfType(srcMember.type()); |
2266 |
if (members.size() <= 0) |
2267 |
return Member(); |
2268 |
if (members.size() == 1) |
2269 |
return members[0]; |
2270 |
for (int i = 0; i < members.size(); ++i) |
2271 |
if (members[i].offset() == srcMember.offset()) |
2272 |
return members[i]; |
2273 |
const int srcSeqNr = srcObj.sequenceIndexOf(srcMember); |
2274 |
assert(srcSeqNr >= 0); // should never happen, otherwise there is a bug |
2275 |
for (int i = 0; i < members.size(); ++i) { |
2276 |
const int dstSeqNr = dstObj.sequenceIndexOf(members[i]); |
2277 |
if (dstSeqNr == srcSeqNr) |
2278 |
return members[i]; |
2279 |
} |
2280 |
return Member(); // give up! |
2281 |
} |
2282 |
|
2283 |
void Archive::Syncer::syncMember(const Member& dstMember, const Member& srcMember) { |
2284 |
assert(dstMember && srcMember); |
2285 |
assert(dstMember.type() == srcMember.type()); |
2286 |
const Object dstObj = m_dst.m_allObjects[dstMember.uid()]; |
2287 |
const Object srcObj = m_src.m_allObjects[srcMember.uid()]; |
2288 |
syncObject(dstObj, srcObj); |
2289 |
} |
2290 |
|
2291 |
// *************** Exception *************** |
2292 |
// * |
2293 |
|
2294 |
Exception::Exception() { |
2295 |
} |
2296 |
|
2297 |
Exception::Exception(String format, ...) { |
2298 |
va_list arg; |
2299 |
va_start(arg, format); |
2300 |
Message = assemble(format, arg); |
2301 |
va_end(arg); |
2302 |
} |
2303 |
|
2304 |
Exception::Exception(String format, va_list arg) { |
2305 |
Message = assemble(format, arg); |
2306 |
} |
2307 |
|
2308 |
/** @brief Print exception message to stdout. |
2309 |
* |
2310 |
* Prints the message of this Exception to the currently defined standard |
2311 |
* output (that is to the terminal console for example). |
2312 |
*/ |
2313 |
void Exception::PrintMessage() { |
2314 |
std::cout << "Serialization::Exception: " << Message << std::endl; |
2315 |
} |
2316 |
|
2317 |
String Exception::assemble(String format, va_list arg) { |
2318 |
char* buf = NULL; |
2319 |
vasprintf(&buf, format.c_str(), arg); |
2320 |
String s = buf; |
2321 |
free(buf); |
2322 |
return s; |
2323 |
} |
2324 |
|
2325 |
} // namespace Serialization |